foo.cpp:1:2: error: stray '#' in program
 =#include <stdio.h>
  ^
foo.cpp:1:1: error: expected unqualified-id before '=' token
 =#include <stdio.h>
 ^
In file included from C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/bits/move.h:57:0,
                 from C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/bits/stl_pair.h:59,
                 from C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/utility:70,
                 from C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/algorithm:60,
                 from foo.cpp:2:
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:359:31: error: 'std::size_t' has not been declared
   template<typename _Tp, std::size_t _Size>
                               ^~~~~~
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:360:25: error: '_Size' was not declared in this scope
     struct is_array<_Tp[_Size]>
                         ^~~~~
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:360:31: error: template argument 1 is invalid
     struct is_array<_Tp[_Size]>
                               ^
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:558:37: error: 'nullptr_t' is not a member of 'std'
     struct __is_null_pointer_helper<std::nullptr_t>
                                     ^~~
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:558:37: error: 'nullptr_t' is not a member of 'std'
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:558:51: error: template argument 1 is invalid
     struct __is_null_pointer_helper<std::nullptr_t>
                                                   ^
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1478:32: error: 'size_t' is not a member of 'std'
     : public integral_constant<std::size_t, __alignof__(_Tp)> { };
                                ^~~
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1478:32: error: 'size_t' is not a member of 'std'
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1478:61: error: template argument 1 is invalid
     : public integral_constant<std::size_t, __alignof__(_Tp)> { };
                                                             ^
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1478:61: note: invalid template non-type parameter
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1483:32: error: 'size_t' is not a member of 'std'
     : public integral_constant<std::size_t, 0> { };
                                ^~~
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1483:32: error: 'size_t' is not a member of 'std'
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1483:46: error: template argument 1 is invalid
     : public integral_constant<std::size_t, 0> { };
                                              ^
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1483:46: note: invalid template non-type parameter
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1485:31: error: 'std::size_t' has not been declared
   template<typename _Tp, std::size_t _Size>
                               ^~~~~~
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1486:21: error: '_Size' was not declared in this scope
     struct rank<_Tp[_Size]>
                     ^~~~~
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1486:27: error: template argument 1 is invalid
     struct rank<_Tp[_Size]>
                           ^
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1487:32: error: 'size_t' is not a member of 'std'
     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
                                ^~~
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1487:32: error: 'size_t' is not a member of 'std'
C:/MinGW32/lib/gcc/i686-w64-mingw32/6.3.0/include/c++/type_traits:1487:65: error: template argument 1 is invalid
     : public integral_con